So. Ipe is a little tricky. The name covers about 50-75 species, not all of them even in the same genus. Color and grain are incredibly variable, but how is in general hard, fine grained, oily and stable.
The how burls I bring in are from the same species and gained only a few percent in weight when I tried to stabilize them. I ha e not tested others, but I highly doubt it is required. This is tough stuff.
As for moisture content, If you bought it as flooring it would be dry. That stuff is kilned. If it was meant for decking it would be partially air dried to about 15% and should dry out In good time.
Be careful glueing it. It's as oily as coco
Ipe Burl: Handroanthus spp: Hard, heavy and durable wood from central and south america. Massive possible variation in appearance, often seen in dull olive/ brown, can range in color from rust red, Pale green, Deep red, nearly black, dark grey, dark blue to slightly purple. Very tight end grain and high oil content means the wood is resistant to moisture. Does not crack very much and is highly durable. Wood takes a superb polish, though glueing can be difficult due to the closed pores and high oil content.
